Device for guiding the movement of the ring rail in spinning machines



March 28, 1961 LLA 2,976,670 Patented Mar. 28, 1 961.

through bodies rolling between the surfaces that slide, therebydiminishing the value of passive resistances and, 2,976,670

DEVICE FOR GUIDING THE MOVEMENT OF THE RING RAIL 1N SPINNING MACHINESLuigi Vella, Province of ?rescia, Cogozzo Valtrompia, taly Filed Apr.21, 1958, Ser. No. 729,963 Claims priority, application Italy May 7,1957 1 Claim. (Cl. 57-137) tion of the machine. It further makes itpossible to reduce the power required for the operation of the machineand, therefore, to attain a sensible saving of absorbed energy.

In ring spinning frames, the ring rail has imparted thereto areciprocating movement for the formation of the super-imposed layers ofyarn and a progressive movement for the formation of the bodies of thecops; said movements being imparted to it by members of the spinningframe which ordinarily are called lifter rods and are placed between twocontiguous spindles at determined intervals along the machine andcooperate with other members placed on the spinning frame whichdetermine those movements.

The modern trend towards shortening as much as possible the cycles ofoperation and reducing idle times, in order to attain reduction ofworking costs, has determined as a consequence a continuous increase ofthe units of capacity and also with spinning frames the present trend isto obtain larger and larger cops, that is, with greater weight of woundyarn.

Especially with old spinning frames that need is felt most since thecapacities attainable with primitive machines are far below present-dayrequirements, when attempts are made to modifying those spinning framesso as to adapt them to the newest trends.

Although the constructive dimensions of the lifter rod and membersconnected therewith are reduced to a minimum, said members stillconstitute a hindrance and a limitation to maximum utilization of thespace existing between spindle and spindle, because if one wants toincrease the diameter of the rings and, consequently, the diameter ofthe bobbins obtainable, at the points where the lifter rods are placed,these would rub against the walls of the bobbins thereby causing damageand defects to the wound yarn.

It is an object of the present invention to provide a device enablingthe utilization of the space available hetween the spindles, by means ofthe displacement of the lifter rod, of its guide and of the members forfastening the ring rail, out of the zone of the spindles, where they donot form any hindrance.

In this case, however, the load upon the lifter rod does not act alongthe longitudinal axis thereof but always acts vertically to create amoment with respect thereto,

because the load is offset.

With conventional systems wherein the lifter rod slides in a guide bush,the offset load would involve an increase of the value of the frictiongenerated by movement, which values prevent practical and economicalembodiments of the system.

On the contrary, the instant device overcomes that therefore, of thepower absorbed by the spinning frame.

Moreover, the reduction of passive resistance affords the possibility ofmore accurate balancing of the masses moving by reciprocating movement.

The invention will be hereinafter described more in detail withreference to the accompanying drawings which illustrate by way ofexample an embodiment of the invention as follows:

Fig. 1 shows a longitudinal section of the device and its position withrespect to some members of the spinning frame;

Fig. 2 shows a cross-section of the device near the top; and

Fig. 3 shows a front view of part of the spinning frame with theposition of assembling of the device.

In the drawings, thin lines represent only those parts of a spinningframe which are indispensable to make clear the operation of the instantdevice.

On the spindle rail 1 of the spinning frame on which the spindles 2 areplaced, there are fixed supports 3 arranged along the spinning frame andeach support 3 has a central hole 4 passing along the longitudinal axisof said support: at the two ends of the support and diametrally opposedwith respect to the hole there are provided grooves 5 of limited length;within said grooves 5 there are accommodated the balls 6.

In the hole 4 there is placed the lifter rod 7 wherein there areprovided the grooves 8 which are diametrally opposed and which run overthe whole length of the lifter rod.

At the upper end of the lifter rod 7 there is fixed a bracket 9 on whichis placed the ring rail 10 which carries rigid thereto the rings 11while the lower end of the lifter rod 7 carries a small socket 12 whichcooperates with the mobile momber 13 of the spinning frame and receivesits movement therefrom.

Two small covers 14 placed at the ends of the support 3 serve as closureand limitation to the race of the balls.

Operation of the device is as follows:

On the spindle rail 1 there are fixed the spindles 2 whereon there arefitted empty tubes whereon then the yarn is wound up in superimposedconical layers, the spindles are made to turn, in a manner known per se,by a belt (not shown); the rail 10 carrying the rings 11 and rigid withthe lifter rod 7 through the support 9, is driven by the member of thespinning frame 13 cooperating with the support 12 to effect a shortreciprocating movement for the formation of the individual layers on thecops and an ascending progressive movement for the formation of thebodies of the cops.

Obviously said movements are carried out by the lifter rod 7 whichrepresents the means for transmission of the movement of the member 13to the rings 11.

Hence said lifter rod 7 slides while resting on the balls 6 (owing tothe off-set load) which in turn roll along the grooves 5 wherein theyare contained, and displace to reciprocate for a path shorter than thelength of said grooves, while the movement for forming the conicallayers is effected.

However at every conical layer the lifter rod 7 (and all the membersfixed thereto) undergoes also a progressive upward displacement by sometenths of millimetre each time, whence at a certain time, when thereciprocating displacement is at its upper dead point, the balls 6 willfind themselves respectively at contact with the small cover 14 for theupper most ball and with the end of the groove for the lowermost ball.

Hence at that time, a slight sliding will occur berod as caused by theoffset load are carried by the guide 5 hindrance, because the lateralthrusts upon the lifter tween the rod 7 and the balls 6, favoured by thefact that the specific pressure exerted by the rod against the balls isvery small and there is sufficient play between the two members to allowtherefor.

Subsequently the reciprocating movement reverses, the rod descends againby a length of path equal to one stroke while resting on the balls which'again roll downwards with a displacement proportional to the amount ofthe stroke, then the movement is reversed and return is made upwards andso on until the tubes fitted on the spindles 2 are completely loadedwith yarn.

At that time, by means of conventional operations on the spinning frame,all of the members are brought back to their position of dofiing startas in Fig. 1, to begin then again with a new cycle.

Of course What has been hereinbefore described and illustrated may bemodified in its details of embodiment in practice within the scope ofthe invention.

I claim:

In a spinning machine including a ring rail, lifting and guiding meansfor said ring rail lying in a plane displaced from the vplane of thecenter of gravity of said ring rail, said means comprising a verticalsupport, a vertical bore through said support, a lifter rod slidablymounted in said bore, said lifter rod being provided with diametricallypositioned longitudinal grooves, a first groove in said bore near theupper end thereof on the side of said bore toward the center of gravityof said ring rail and of approximately half the length of the distanceof vertical movement of said lifter rod, a ball bearing seated in saidfirst groove in said bore extending into and bearing in one of saidgrooves in said lifter rod, a second groove in said bore on the side ofsaid bore remote from the center of gravity of said ring rail near thelower end thereof of approximately half the length of the distance ofvertical movement of said lifter rod, said second groove being on thediametrically opposite side of said bore from said first groove, 21 ballbearing seated in said second groove and bearing in the other of saidgrooves in said lifter bar, and said first groove and said second groovelying in a plane normal to the plane of the center of gravity of thesaid ring rail.

References Cited in the file of this patent UNITED STATES PATENTS

